I assume you mean a 2-speed? Go with the 1 HP. With a 200# sand filter even that on high speed may be overkill. My pool is 22K also and a 1 HP single speed Hayward pump with 300# sand filter and that's been working fine. In any case you'll be running on low speed most of the time anyhow and that won't be overkill for that filter.
Al